Table 1: Energy of collapsed and circular (n,n) tubes(relative to graphite)

(n,n) Atoms R(å) Ecircular Ecollapsed (n,n) Atoms R(å) Ecircular Ecollapsed
10 40 6.73 2.5418 50 200 33.66 1.3793 1.3251
11 44 7.41 2.3366 60 240 40.39 1.3641 1.2353
12 48 8.08 2.1790 70 280 47.13 1.3550 1.1715
13 52 8.75 2.0556 80 320 53.86 1.3490 1.1232
14 56 9.43 1.9571 90 360 60.59 1.3450 1.0858
15 60 10.10 1.8773 100 400 67.32 1.3420 1.0559
16 64 10.77 1.8117 110 440 74.05 1.3399 1.0313
17 68 11.44 1.7572 2.4340 120 480 80.79 1.3383 1.0109
18 72 12.12 1.7115 2.3293 130 520 87.52 1.3372 0.9939
19 76 12.79 1.6726 2.2369 140 560 94.25 1.3361 0.9791
20 80 13.46 1.6394 2.1553 150 600 100.98 1.3354 0.9659
30 120 20.20 1.4678 1.6847 160 640 107.72 1.3348 0.9552
40 160 26.93 1.4074 1.4600 170 680 114.45 1.3341 0.9452
41 164 27.60 1.4036 1.4435 180 720 121.18 1.3337 0.9362
42 168 28.28 1.4002 1.4278 190 760 127.91 1.3332 0.9284
43 172 28.95 1.3969 1.4128 200 800 134.65 1.3326 0.9211
44 176 29.62 1.3939 1.3987 210 840 141.38 1.3324 0.9146
45 180 30.30 1.3910 1.3849 220 880 148.11 1.3321 0.9088
46 184 30.97 1.3884 1.3720 230 920 154.84 1.3318 0.9035
47 188 31.64 1.3859 1.3594 240 960 161.57 1.3318 0.8984
48 192 32.31 1.3836 1.3476 250 1000 168.31 1.3317 0.8943
49 196 32.99 1.3814 1.3361



Table 2: Energy of collapsed and circular (n,0) tubes(relative to graphite)

(n,0) Atoms R(å) Ecircular Ecollapsed (n,0) Atoms R(å) Ecircular Ecollapsed
10 40 3.89 4.7507 77 308 29.93 1.3926 1.3968
20 80 7.77 2.2446 78 312 30.32 1.3910 1.3898
21 84 8.16 2.1614 79 316 30.71 1.3894 1.3816
22 88 8.55 2.0890 80 320 31.09 1.3879 1.3743
23 92 8.94 2.0255 90 360 34.98 1.3757 1.3098
24 96 9.33 1.9697 100 400 38.87 1.3669 1.2586
25 100 9.72 1.9203 110 440 42.76 1.3604 1.2163
26 104 10.11 1.8763 120 480 46.64 1.3555 1.1818
27 108 10.49 1.8371 130 520 50.53 1.3516 1.1517
28 112 10.88 1.8019 2.5316 140 560 54.42 1.3486 1.1262
29 116 11.27 1.7702 2.4623 150 600 58.30 1.3461 1.1042
30 120 11.66 1.7416 2.3980 160 640 62.19 1.3441 1.0850
40 160 15.55 1.5623 1.9563 170 680 66.08 1.3424 1.0683
50 200 19.43 1.4788 1.7217 180 720 69.96 1.3410 1.0532
60 240 23.32 1.4333 1.5672 190 760 73.85 1.3398 1.0392
70 280 27.21 1.4058 1.4567 200 800 77.74 1.3388 1.0270
71 284 27.60 1.4037 1.4476 210 840 81.62 1.3380 1.0160
72 288 27.99 1.4016 1.4384 220 880 85.51 1.3372 1.0062
73 292 28.37 1.3997 1.4298 230 920 89.40 1.3366 0.9971
74 296 28.76 1.3978 1.4213 240 960 93.28 1.3360 0.9884
75 300 29.15 1.3960 1.4129 250 1000 97.17 1.3355 0.9808
76 304 29.54 1.3942 1.4047



Table 3: Energy of collapsed and circular (2n,n) tubes

(2n,n) Atoms R(å) Ecircular Ecollapsed
5 140 5.14 3.3639
10 280 10.28 1.8579
11 308 11.31 1.7672 2.4559
12 336 12.34 1.6979 2.2969
13 364 13.37 1.6438 2.1660
14 392 14.40 1.6008 2.0572
15 420 15.43 1.5660 1.9660
20 560 20.57 1.4629 1.6690
25 700 25.71 1.4149 1.4938
26 728 26.74 1.4085 1.4664
27 756 27.77 1.4028 1.4415
28 784 28.79 1.3976 1.4182
29 812 29.82 1.3930 1.3961
30 840 30.85 1.3888 1.3757
35 980 35.99 1.3731 1.2917